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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 09 51 13 -ACOUSTICAL PANEL CEILINGS <br /> b. Unfaced <br /> c. High Density Cotton <br /> d. Class A Fire Rating. <br /> 2. Approved equal. <br /> PART 3-EXECUTION <br /> 3.1 EXAMINATION <br /> A. Examine substrates and structural framing to which acoustical panel ceilings attach or abut, with Installer present, <br /> for compliance with requirements specified in this and other Sections that affect ceiling installation and anchorage, <br /> and other conditions affecting performance of acoustical panel ceilings. <br /> 1. Proceed with installation only after unsatisfactory conditions have been corrected. <br /> 3.2 PREPARATION <br /> A. Coordination: Furnish layouts for cast-in-place anchors, clips, and other ceiling anchors whose installation is <br /> specified in other Sections. <br /> B. Measure each ceiling area and establish layout of acoustical panels to balance border widths at opposite edges of <br /> each ceiling. Avoid using less-than-half-width panels at borders, and comply with layout shown on reflected ceiling <br /> plans. <br /> 3.3 INSTALLATION <br /> A. Install acoustical panel ceilings in accordance with the International Building Code, Section 1621.2.5 and authorities <br /> having jurisdiction. <br /> 1. Ceiling system installation and components shall conform to seismic requirements for Seismic Design <br /> Category B. <br /> B. Suspend ceiling hangers from building's structural members and as follows: <br /> 1. Install hangers plumb and free from contact with insulation or other objects within ceiling plenum that are not <br /> part of supporting structure or of ceiling suspension system. <br /> 2. Splay hangers only where required to miss obstructions; offset resulting horizontal forces by bracing, <br /> countersplaying, or other equally effective means. <br /> 3. Splay hangers only where required and, if permitted with fire-resistance-rated ceilings, to miss obstructions; <br /> offset resulting horizontal forces by bracing, countersplaying, or other equally effective means. <br /> 4. Where width of ducts and other construction within ceiling plenum produces hanger spacings that interfere <br /> with location of hangers at spacings required to support standard suspension system members, install <br /> supplemental suspension members and hangers in form of trapezes or equivalent devices. Size supplemental <br /> suspension members and hangers to support ceiling loads within performance limits established by <br /> referenced standards and publications. <br /> 5. Secure wire hangers to ceiling suspension members and to supports above with a minimum of three tight <br /> turns. Connect hangers directly either to structures or to inserts, eye screws, or other devices that are secure; <br /> that are appropriate for substrate; and that will not deteriorate or otherwise fail due to age, corrosion, or <br /> elevated temperatures. <br /> 6. Do not support ceilings directly from permanent metal forms or floor deck. Fasten hangers to cast-in-place <br /> hanger inserts, powder-actuated fasteners, or drilled-in anchors that extend through forms into concrete. <br /> 7. Do not attach hangers to steel roof deck.Attach hangers to structural members. <br /> 8. Space hangers not more than 48 inches o.c. along each member supported directly from hangers, unless <br /> otherwise indicated; and provide hangers not more than 8 inches from ends of each member. <br /> C. Secure bracing wires to ceiling suspension members and to supports with a minimum of four tight turns. Suspend <br /> bracing from building's structural members as required for hangers, without attaching to permanent metal forms, <br /> steel deck, or steel deck tabs. Fasten bracing wires into concrete with cast-in-place or postinstalled anchors. <br /> D. Install edge moldings and trim of type indicated at perimeter of acoustical ceiling area and where necessary to <br /> conceal edges of acoustical panels. <br /> 1. Apply acoustical sealant in a continuous ribbon concealed on back of vertical legs of moldings before they are <br /> installed. <br /> 2. Screw attach moldings to substrate at intervals not more than 16 inches o.c. and not more than 3 inches from <br /> ends, leveling with ceiling suspension system to a tolerance of 1/8 inch in 12 feet. Miter corners accurately <br /> and connect securely. <br /> 3. Do not use exposed fasteners, including pop rivets, on moldings and trim. <br /> ©BOOMERANG DESIGN#1835 0951 13-3 510 Meadowlands Drive,Hillsborough, NC <br /> ORANGE COUNTY,NC 11/15/18 <br />